Frequently Asked Questions — kJ to J
Question: How do you convert kilojoules to joules?
Answer: Multiply by 1,000. For example, 5 kJ = 5,000 J.
Question: How many joules are in 1 kilojoule?
Answer: Exactly 1,000 joules. 1 kJ = 1,000 J. This is an exact relationship by definition.
Question: What is 100 kJ in joules?
Answer: 100 x 1,000 = 100,000 joules (100 kJ).
Question: What is 3,600 kJ in joules?
Answer: 3,600 x 1,000 = 3,600,000 joules = 1 kilowatt-hour (kWh), the unit used to measure electrical energy on utility bills.
Question: What is a joule?
Answer: A joule (J) is the SI unit of energy, equal to the work done when a force of one newton acts over one meter (J = N x m). It is the fundamental unit for all forms of energy in physics and engineering.